We have ticklers

And they are awesome. (Though, like most of 3.0 at the moment, they could be prettier. I will spend some time on cosmetic improvements at some point). Also there is a great new demo project contributed by a 3.0 user. Thanks Michael S.

http://monkeygtd.tiddlyspot.com/demo3.html
http://monkeygtd.tiddlyspot.com/empty3.html
http://monkeygtd.tiddlyspot.com/upgrade3.html